<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>sys-shim page</title>
    <script type="text/javascript"></script>
  </head>
  <script>
    new Sys().then(async main => {
      window.main = main
      main.form.show()
    })
  </script>
  <body>
    <button onclick="main.win.msgbox(`hello`, `title`)">msgbox</button>
    <button onclick="main.win.quitMessage()">exit</button>
  </body>
</html>
